class Aanimal:
    def _init_(self,species,sound):
        if species in['猫','狗','羊','猴子','老虎','大象']:
            self.species = species
            self.sound = sound
        else:
            self.species =None
            self.sound = None
def spenak(self):
    if self.species == None:
        print('动物园里没有动物,游戏结束!')
        return False
    else:
        print(self.species, self.sound)
        return True
print('动物园里有什么？')
flag = True
while flag:
    s = input('请输入动物种类和叫声(使用空格隔开):')
    list1 = s.split(' ')
    animal = animal(list1[0], list1[1])
    flag = animal.speak()